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WESTMINSTER MEDICAL OFFICE INC
NPI 1306983812
Internal Medicine in Garden Grove, CA

Active since January 31, 2007
10141 WESTMINSTER AVE, SUITE E, GARDEN GROVE, CA 92843(714) 467-4321(714) 467-4311 Get Directions Write a Review

NPPES record last updated: October 16, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 1, 2023, Oct 16, 2023 (2 updates tracked since 2023).

About Westminster Medical Office Inc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WESTMINSTER MEDICAL OFFICE INC (NPI 1306983812) is a healthcare organization registered as an internal medicine in Garden Grove, California and active in the NPI registry since January 2007. The organization lists Vuong Huu Nguyen, President, as its authorized official.

NPPES Registry Identity

NPI1306983812
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameWESTMINSTER MEDICAL OFFICE INC
Location Address10141 WESTMINSTER AVE, SUITE EGarden Grove, CA 92843-4790
Mailing Address13671 Beach Blvd Ste AWestminster, CA 92683-3200 · (714) 467-4321 · Fax (714) 467-4311
Phone(714) 467-4321
Fax(714) 467-4311
Organization SubpartNo
Authorized OfficialVuong Huu NguyenPresident · (714) 467-4321
Enumeration DateJanuary 31, 2007
Last NPPES UpdateOctober 16, 20232 updates tracked since enumeration
NPPES CertifiedOctober 16, 2023
✔ NPI 1306983812 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in CA · A69222✔ Licensed in CA · MN1982152✔ Licensed in CA · MP2557025
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedFamily MedicineTaxonomy 207Q00000X
10141 WESTMINSTER AVE, Garden Grove, CA 92843
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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Westminster Medical Office Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Westminster Medical Office Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Vuong Nguyen, M.D.
Internal Medicine
NPI 1093701690
13671 BEACH BLVD STE A
Westminster, CA 92683
(714) 467-4321
✔ PECOS✔ Accepts Medicare2.2 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 05D1032215

Westminster Medical Office Inc · Westminster, CA
Expired · Oct 18, 2026
CLIA Number05D1032215
Laboratory TypePhysician Office
Certificate Effective DateOctober 19, 2024
Certificate Expiration DateOctober 18, 2026
Laboratory DirectorVuong H. Nguyen
Laboratory Phone(714) 467-4321
Laboratory LocationWestminster Medical Office Inc13671 Beach Blvd Ste A, Westminster, CA 92683
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Westminster Medical Office Inc's NPI number?

The NPI number for Westminster Medical Office Inc is 1306983812. It was assigned to this organization in the NPPES registry on January 31, 2007.

Where is Westminster Medical Office Inc located?

Westminster Medical Office Inc is located at 10141 Westminster Ave Suite E, Garden Grove, CA 92843. The listed phone number is (714) 467-4321.

What is Westminster Medical Office Inc's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Westminster Medical Office Inc enrolled in Medicare?

Yes. Westminster Medical Office Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Westminster Medical Office Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Westminster Medical Office Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Westminster Medical Office Inc was last updated on October 16, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.